The C919, the world's first Chinese-made large aircraft, arrived at Qingdao Jiaodong International Airport for a verification flight on Jan. 15. Previously, the C919 aircraft has carried out intensive test flights at six airports in five cities, including Shanghai, Beijing, Chengdu, Xi 'an and Haikou. It will continue to carry out verification flights in Jinan, Nanchang, Wuhan, Hefei, Nanjing, and Taiyuan in the near future. The C919 is expected to put into commercial operation in the spring of 2023. (Photo/ Zhang Jingang)